Engine-governor.



0. GRANT ENGINE GOVERNOR.

APPLIGATION FILED MAY 21, 1906.

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ANDREW a swwm co. PHOTD-UTNOGRAPHKRS WASHINGTON. n. c

0. GRANT.

ENGINE GOVERNOR.

APPLICATION FILED MAY 21, 1906.

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APPLICATION FILED MAY 21, 1906.

Patented May 31, 1910.

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ANDREW s GRAHAM cofimow umcsmvuzwa \VASHINGTON. 01c

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CHARLES GRANT, OF NEW YORK, N. Y., ASSIGNOR OF ONE-HALF T0 RICHARDPLUNKE'IT, OF NEW YORK, N. Y.

ENGINE-GOVERNOR.

To all whom it may concern:

Be it known that I, CHARLES GRANT, a citizen of the United States,residing in the borough of Brooklyn, county of Kings, city. and State ofNew York, have invented certain new and useful Improvements inEngine-Governors, of which the following is a specification.

This invention relates to governors for engines or the like, and aims toprovide certain improvements therein.

In its preferred form my invention oomprises a governor having aninertia element and a centrifugal element, both of which conjointly actupon the valve stem or other part controlling the admission of fluid. Bypreference I utilize for the inertia element a ring which is rotatablymounted upon the governor body, and for the centrifugal element a pairof fly-balls which are loosely mounted upon the governor body so thatthey are capable of an angular movement relative thereto. Preferably thetwo elements are so connected that the action of one necessarilyinvolves the action of the other so that they modify each other andprovide an extremely even and regular movement of the engine or otherdevice.

In the drawings wherein I. have shown my invention in its preferredform, Figure 1 is a diametrical section taken approximately on the line1, 1 in Fig. 2; Fig. 2 is a detail; Fig. 3 is a plan with the fly ballsremoved; Fig. 4 is a detail showing the shape of the cam employed; Fig.5 is a plan of the governor showing the parts in normal runningposition.

In the drawings let A indicate the valve stem or other part which it isdesired to control, B a suitable bracket adapted to be bolted to theengine frame, C the governor body, and D a suitable pulley geared to thegovernor body by means of a shaft (4 and beveled gears Z), c. Any othermethod of mounting the governor may be adopted, and for the valve stem Amay be substituted any part by the movements of which the engine is tobe controlled. The valve stem is continued upwardly through the governorbody, and is provided at its upper end with a grooved collar d held inplace by a nut e. f is a split ring fitting loosely in the groove of thecollar (Z, the halves of which ring are carried by a collar 9 as bestseen in Fig. 2. This construction permits the governor bodySpecification of Letters Patent.

Application filed May 21, 1906.

Patented May 31, 1910.

Serial No. 317,972.

and ring 9 to rotate independently of the valve stem while permittingthe ring 9 to move the valve stem lengthwise in accordance with theposition of the elements of the governor.

The form of inertia weight which I prefer to employ is a heavy ring E,mounted above the governor body C, a series of balls it being preferablyinterposed between the two. Bolts screwed to the inertia ring E andworking in slots is in the governor body hold the parts against verticalseparation. The relative movements of the governor body 0 and theinertia ring E are communicated to the valve stem A by means of suitablecams 7,, m, fixed upon the inertia ring, said cams acting upon arms a, afixed to the ends of rock shafts 0, 0 mounted in bearings upon thegovernor body, such shafts carrying at their opposite ends arms p, pengaging pins g, (7 upon the collar g.

The centrifugal element of the governor preferably comprises twocomparatively light balls F, F which are preferably fixed at the upperends of shafts s, s, the lower ends of which shafts are mounted in thegovernor body in such manner as to permit an angular movement of theshafts as well as the usual. radial movement which would be occasionedby the outward and inward movements of the balls acting centrifugally.The balls F, F are connected to the valve stem through the medium of theinertia ring E and the parts just described. The mechanism which Iprefer to employ between the fiy-balls and the inertia ring is best seenin Fig. 3, and comprises links it, t the inner ends of which are pivotedto the shafts s, s, and the outer ends of which are pivoted respectivelyto the governor body and the inertia ring. The connection with thegovernor body is preferably made through the medium of arms 1, 0, fixedto the governor body and extended upwardly within the governor andoutwardly to points near the periphery of the inertia ring, as shown inFig. 3. Springs u, a are provided for resisting relative movement of theinertia ring and governor body in a forward direction, such springshaving one end fixed to the arms 9", 1", on the governor body and one tothe studs 4:, e on the inertia ring E. An additional spring in ispreferably provided between the shafts s, s, which tends to effect thesame result.

In operation, if the engine be started slowly and evenly, the fly-ballsWlll gradually move outwardly under the action of centrifugal force fromthe position shown in Fig. 3 to the position in which the arms a, n areabout midway between the ends of the cams Z, m, as shown in F1g. Thevalve A, which, is fully open in Fig. 3 is moved to the partly openposition 1t normally occupies during running. If part of the load issuddenly taken off the engine the governor body will at once tend to runahead of the inertia ring so that the arms a, 72. rise suddenly higherin the cams Z, m, whereby the valve is more nearly closed. As thegovernor body runs ahead of the inertia ring, the arms 7", r, arecarried from the positions shown in Fig. 5 in full lines to those shownin dotted lines, and the fly balls F, F move outwardly toward the dottedline position in this figure, In this operation the fly balls also tendto lag behind the governor. As they move outwardly they also moverelatively rearwardly as shown in Fig. 5, being constrained to followthis path by reason of the fact that the levers t, t swing around thearms 1" which are fixed to the governorbody. The centrifugal weightsalso act as inertia weights and being mounted upon the ends of the longshafts s, such centrifugal weights act with considerable leverageagainst the arms 25, t. When an additional load is thrown upon theengine the governor body tends to lag behind the inertia ring andfiy-balls so that the cams Z, m move forwardly until the arms a, a nearthe position shown in Fig. 3, thus further opening the valve. To effectthis result the fiy-balls must be moved inwardly against the action ofcentrifugal force which tends to maintain them in their given circularpath of movement. All sudden changes in load are promptly communicatedto the valve stem through the inertia action of the governor, whilegradual changes are communicated through the centrifugal element.

I have found in practice that the governor provided by my invention isexceptionally sensitive in its movements, responding to small variationsin the load upon the engine. The most important feature of my invention, however, is that the movements of the governor do not tend toproduce a greater correction in the position of the valve than isrequired by the differences in variation of load. I-Ieretofore no greatdiiiiculty has been encountered in providing a governor of sufficientsensitiveness, but most of such governors do not operate so as toprovide an even and regular movement of the engine notwithstanding thedifierences in load. The governor provided by me will quickly respond tominute variations, but

this response is even and holds the engine to its adjusted load withoutproducing an overthrow of the valve.

Although I have described in detail the preferred form of my invention,I do not wish to be limited thereto, as many changes may be made thereinwithout departing from the spirit of my invention.

What I claim is 1. In a governor, the combination of a body mounted forrotation in a fixed plane,

an inertia wheel coaxial therewith and movable thereto in a fixed plane,a centrifugal weight mounted on said body to swing freely, a connectionbetween said centrifugal weight and said'inertia wheel adapted to causesaid centrifugal weight to lag relatively to said governor body in thedirection opposite the direction of rotation when said centrifugalweight moves outwardly under centrifugal force, and said connectionbeing adapted to cause said centrifugal weight to advance relatively tosaid governor body when the former moves inwardly, and a transmissionconnection adapted to be moved by the movement of the parts beforementioned.

2. In a governor, the combination of a body mounted for rotation in afixed plane, an inertia wheel coaxial therewith and n1ovable thereto ina fixed plane, a centrifugal weight mounted on said body to swingfreely, a connection between said centrifugal weight and said inertiawheel adapted to cause said centrifugal weight to lag relatively to saidgovernor body in the direction opposite the direction of rotation whensaid centrifugal weight moves outwardly under centrifugal force, andsaid connection being adapted to cause said centrifugal weight toadvance relatively to said governorbody when the former moves inwardly,and a transmission connection adapted to be moved by the movement of theparts before mentioned, said connect-ion comprising a toggle mechanism,a oint of which is connected with said centrifugal weight,

3. In a governor, the combination of a body mounted for rotation in afixed plane, an inertia wheel coaxial therewith and movable thereto in afixed plane, a centrifugal weight mounted on said body to swing freely,a connection between said centrifugal weight and said inertia wheeladapted to cause said centrifugal weight to lag relatively to saidgovernor body in the direction opposite the direction of rotation whensaid centrifugal weight moves outwardly under centrifugal force, andsaid connection being adapted to cause said centrifugal weight toadvance relatively to said governor body when the former moves inwardly,and a transmission connection adapted to be moved by the movement of theparts before mentioned, said connection comprising a toggle mechanism, ajoint of which is connected with said centrifugal weight, and saidcentrifugal weight being mounted upon an elongated shaft the end ofwhich is loosely connected to said governor body.

4:. In a governor, the combination of a body mounted for rotation in afixed plane, an inertia wheel coaxial therewith and movable thereto in afixed plane, a plurality of centrifugal Weights mounted on said body toswing freely, a connection between said centrifugal weights and saidinertia weights adapted to cause said centrifugal weights to lagrelatively to said governor body in the direction opposite the directionof rotation when said centrifugal weights move outwardly undercentrifugal force, a spring tending to hold said centrifugal weights intheir inward positions, and a transmission connection adapted to bemoved by the movements of said inertia wheel and weights.

In a governor, the combination of a body mounted for rotation in a fixedplane, and an inertia wheel coaxial therewith and movable relativelythereto in a fixed plane, a centrifugal weight mounted on said body at apoint which is eccentric to the axis of said body and adapted to moverearwardly as it moves outwardly, a connection between said centrifugalweight and said inertia weight, and a transmission connection adapted tobe moved by the movements of the parts before mentioned.

6. In a governor, the combination of a body mounted for rotation in afixed plane, an inertia wheel coaxial therewith and movable relativelythereto in a fixed plane, a centrifugal weight mounted on said body toswing freely, and means for causing said centrifugal weight to lagrelatively to the governor body in the direction opposite the directionof rotation when said centrifugal weight moves outwardly undercentrifugal force, and said centrifugal weight being adapted to maintaina substantially fixed plane during its outward, inward and laggingmovements.

In witness whereof, I have hereunto signed my name in the presence oftwo subscribing witnesses.

GHARLES GRANT. Witnesses:

DOMINGO A. USINA, THEODORE T. SNELL.

